Harrow



(N0 Mod No. 317,768. Patented May 12, 1885.

1 .F FEW/W I g NITED STATES PATENT Germs.

FRANK M. HAKES, OF MARTELLE, IOWA.

HARROW.

SPECIFICATION forming part of Letters Patent No. 317,768, dated May 12,1885.

' Application filed July 24, 1884. (No model.)

To all whom it may concern:

Be it known that I, FRANK M. HAKEs, a citizen of the United States ofAmerica, residing at Martelle, in the county of Jones and State of Iowa,have invented certain new and useful Improvements in Harrows; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same, reference being had to theaccompanying drawings, and to letters or figures of reference markedthereon, which form a part of this specification.

My invention is a harrow; and it consists in the improvementshereinafter described and set forth, whereby an efficient and durableharrow structure is produced in which the position of the teeth may bereadily changed by the operator from a vertical to an inclined position.

In the accompanying drawings, forming part of this specification, Figure1 is a perspective view of an improved harrow constructed in accordancewith my invention. Fig. 2 is a detail perspective view of one of theharrow-teeth sockets.

The supporting-frame of the harrow consists of a series of bars whichare connected together so as to form an obtuse angle, and therebyconstitute a zigzag frame. The joints of these bars are re-enforced andconnected by means of angle-plates A. Upon the under side of said bars,at the joints and about midway thereof, are secured a series of hangers,a, in which bear the cylindrical portions of a series of paralleltransverse shafts, B. Each shaft 13 has secured thereto, at the centerand at each end thereof, a casting, O, which forms the socketfor theupper end of one of the harrow-teeth b. This casting O is preferably ofthe form shown in the detail view, Fig. 2, and consists of the lowersocketed portion, 02, and upper clamp plate, 6. The portion (2 has asquare recess, in which is clamped the upper end of the harrow-tooth b.A second recess or notch, f, formed centrally in the upper portion ofthe said section d,enables the same to embrace one of the bars B, and issecured bolts 9 pass.

An arm, D, is provided at its lower end with an enlarged portion, h, inwhich is formed a square opening,by which the said enlarged portionembraces one of the shafts B, so as tc move therewith when the same isoscillated in its bearings, and the upper end of said arm D isbifurcated to receive a rod, E, which passes centrally andlongitudinally along the harrow.

-A platform, F, is secured transversely at one end of the harrow, andthe said platform has centrally secured thereon a segmental rack-plate,G, to which is pivoted the lower end of a lever, H, carrying aspring-catch, z, adapted to engage the teeth of the segmental plate G,and be disengaged therefrom by means of a bell-crank, j, pivoted on theupper side of said lever. The said lever is connected by a link, I, tothe longitudinal shaft E.

From the foregoing it will be apparent that the teeth have afirni andrigid bearing in the casting O, and that the operator can manipu latethe lever from the platform F to simultaneously change all the teethfrom an inclined to a vertical position, or vice versa. Moreover, thecastings O can be readily adjusted transversely on their shafts B.

Draft-hooks K are secured on a platform, L, located transversely at thefront of the harrow.

I claim- The combination, in a harrow constructed and operatingsubstantially as described, ol

the casting constituting the harrow-socket,and

consisting of the section (1, provided with the notch fand independentplate 6, and an independent harrow-tooth having its end fitting in saidsocket, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

FRANK M. HAKES.

Witnesses: GEORGE W. MELLEE, J OHN REMINGTON.

